AB-452 (AB452) is a potent, small molecule inhibitor of noncanonical poly(A) polymerases PAPD5 and PAPD7 (PAPD5/7), inhibits PAPD5/7 enzymatic activities, reduces HBsAg in vitro (EC50=1.4/6.8 nM).AB-452 demonstrated specific antiviral activity for HBV, was inactive against a panel of 10 different RNA and DNA viruses with EC50 values of >30 uM.AB-452 reduced HBsAg, HBeAg, and HBV DNA production with EC50 of 0.28-6.8 nM, without cytotoxicity.AB-452 interferes with multiple steps of HBV life cycle by reducing HBV RNA.AB-452 demonstrated antiviral activity in AAV-HBV-transduced mouse model.AB-452 promotes HBV RNA degradation through inhibiting PAPD5 and PAPD7 enzymatic activities and blockage of guanosine incorporation into viral RNA poly(A) tails..

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.